{"id":"wal-uses-crc32-not-sha","text":"WAL integrity uses `zlib.crc32` (32-bit, non-cryptographic); it detects accidental corruption but not intentional tampering","truth_value":"IN","source":"entries/2026/05/28/topic-wal-checksum-format.md","source_url":"","source_hash":"","justifications":[],"dependents":["lsm-wal-strictly-weaker-than-standalone-wal"],"metadata":{"example":"checksum = zlib.crc32(key + value) & 0xFFFFFFFF"},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"wal-uses-crc32-not-sha","truth_value":"IN","reason":"premise"}]}}